Question and response
Question
dig hketcmail.com. MX
Answer
hketcmail.com. 900 MX 10 mail.hketcmail.com.
Authority
hketcmail.com. 900 NS host1.cntech.net.
hketcmail.com. 900 NS ca.hketc.net.
hketcmail.com. 900 NS host2.cntech.net.
hketcmail.com. 900 NS us.hketc.net.
Additional
mail.hketcmail.com. 900 A 116.92.229.10
host1.cntech.net. 900 A 157.245.195.0
host2.cntech.net. 900 A 139.162.27.162
us.hketc.net. 900 A 202.155.202.114
ca.hketc.net. 900 A 116.92.229.27
host1.cntech.net. 900 AAAA 2400:6180:0:d0:0:0:132b:3001
host2.cntech.net. 900 AAAA 2400:8901:0:0:f03c:93ff:fe89:a03a
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0